Air cooling and purifying device for motor-drive tire pumps



Jan. 30, 1923. 1,4 2,435.

. D. ROHRER. AIR COOLING AND PURIFYING DEVICE FOR MOTOR DRIVE TIRE PUMPS.

' riLEp MAR. 24, 1921. 2 SHEETS-SHEET 1.

avvoewboz Jan. 30, 1923.

AIR COOLING AND PURIFYING, DEVICE FOR MOTOR DRIVE TIRE PUMPS. FILED MAR. 24,1921- 2 SHEETS-SHEET 2' I. gnoewtoz (,wmm jafzzkz 217%??? Mme/1 o I 1,443,435. D. ROHRER.

Patented den.

i entree: stairs nane earner, caries.

DANIEL nonnnn, or SPOKANE, wasninsron.

are economic Ann runrrr nennvicn roe MOTOR-DRIVE Tran ruivrrs.

Application filed March 24, 1921. Serial No. 455,251.

1 all whom it may concern:

Be it known that I, DANIEL Ronnnn, a

citizen of the Dominion of Canada, residing at Spokane, in the county of Spokane and. State of WVashington, have invented certain new and useful Improvements inAir Cooling and Purifying Devices for Motor-Drive Tire Pumps; andI do declare the following to be a full, clear, and exact, description of the invention, such as will enable others skilled in the art to which it appertains to make and'use the same.

My invention has forits principal object to provide a simple and inexpensive oil device in a unique manner so as to not only effectively cool the air before it is dischargedinto thetires, but to greatly assist,

in some instances in effecting proper. condensationof the oil vapor with which the air dischargedfrom the pump, is laden.

With the foregoing in view, the invention resides in the novel construction and assoc1a- .tion of parts hereinafter. described and claimed, the descriptive matter being supplemented by the accompanying drawings. Figures 1 and 2 are respectively a side ele-' vation and a verticalsectional view of one form of my invention.

Figure 3 is a horizontal sectional view as indicated by line 33 of Fig. 1.

Figure t is a vertical sectional view showing a further form of construction.

Figure 5 is a view similar to Fig. 4: but illustrating still another form of construction. I

In the construction shown in Figs. 1, 2 and 3, the numeral 1 designates a vertically elongated cylinder preferably provided on its exterior with plurality of parallel circumferential cooling fins 2. The lower end wall 3 of'the cylinder may well be integral with the side wall thereof but the upper end t is by preference in the form of a removable'screw plug. The bottom 3 is provided with a central air inlet 5 and a short tube 6 rises from said bottom around said inlet,

the upper end of said tube being closed but provided with air outlet perforations 7 The oil laden air entering the cylinder 1 through the inlet 5, tube Gand openings 7,

is cooled and the oil vapor is condensed so I that the oil settles to the bottom of said cylinder around the tube ,6, from whichit may be drained from, time to time, through i a suitable petcock 8, or like device.

Surrounding the cylinder-1 and its fins 2 isan air cooling coil 9' whoseinlet end l0 communicates with the upper end of the cyl inder as seen in Fig. 2., The other end of the coil however is suitably connected withthe usual, tire inflating hose ll gThe air from the cylinder, being freed of oiljvapor passes through tlIQCOOllIIg coil 10 andis thusefl'ectively cooled to agreater extent than if it were allowed to escape directly from the cylinder through the hose 11, the resultbeing that the air has no injurious ellecton the hose and the tire tubes, whereas hot airis very injurious. y j i f To absolutely ins re: that no .oil'vapor whatever shall escape from thejcylinder 1, I preferably, mounta quantity of absorbent materiallQ in said cylinder between open-1 work partitions 13, but it to loe understood that the device may be successfully used without this'absorbent material in some instances.

In the form of construction shown in Fig.

the lower end wall 3 of the cylinder 1 is provided with an aiiflinlet. 5 whichex tends upwardly and laterally andcommunr.

cates with .theinlet end 10 of anair cool ing coil 9 which surrounds the cylinderand its cooling fins 2% thedischargeend 114: of said coil being passed through the vertical wall of the cylinder and .turned downwfardly as shown. Byvthis arrangement, the air from the pump is eifectivelycooled before it is discharged into the cylinder and the final cooling and condensation of oil vapor takes place inthe latter, a suitable pet-cock or the like 8 being employed for drainingv the oil from the cylinder whenever necessary.

inder. This sleeve insures that, the air from the coil shall travel downwardly and then turn upwardly before it discharges through the outlet 15, this being desirable in effecting properseparation of the oil vapor from the air. Within the sleeve 17, I preferably,

The upper end wall 4 of the cylinder 1* although notniecessarily mount a quantity of absorbent material as indicated at lS.

Fig. 5 illustrates a still further nodihcation of my invention, in which the lower end wall 3 of the cylinder 1 is of coinparatirely great tlnclmess,='sa1d end wall being provided with an air inlet passage 5" which extends upwardly and laterally and communicates w th the inlet end 10 of an air cooling COll Q", which coil surrounds thecylinder and discharges at 14:? into a passage 18. which v extends horizontally andupwardly through the llOlJlZOIIl 'WZlll 3", a perforated tube 6" v identical withthe tube 6, heingprovided at thev outlet of this passage for the san e reasons as those assigned to the aforesaid. tubefi.

The form "of 2 construction last described is provided with a" pt cock 8? for draining accumulated .oil therefrom All forins of inventionflare comparatiyely simple"and inekpensive, yet will be highly efficient. and desirable for cooling the air discharged. from motor driven tire am wml for condensing any oil vapor in the air .to .preyent its-from enteringand i' juring th inflation hose and the tire tubes.

Since excellent results may be obtained frorn thel detail isclos'e d such details inay he followedif desiredf I wish it understood 11we ert1ha;&+itiii1i the scope -r thei'nventioii asjclaiined, the device may be embodied in nurn forms other than thosc shown.

i i w .c r V a 1.: An air cooling and filtering device co1n prising a- I hollow cylinder Whose interior forms anf oil vapor condensing chamber, spaced circ un1'ter 3 1t a l fins 'onthe outslde of said cylinder, an air coolingcoil surround-- ing said cylinder in spaced relation with said line and communicating at one end with said chan'lber onc end Ofthe cylinder having an air inlet passage for connection with a pump and with said coil and the other having an air outlet for connection with a tire inflating hosc,'a'n' air filter in said chamber to remove all oil from the air, and an oil drain from the lower end of the cylinder..

2. A device of the class described coniprising a holler-l oil vapor condensing cyl= inder closed at both ends and provided in its upper end wall with an air outlet adapted for connection to a tire inflating hose, the lower end wall of said cylinder having an air inlet passage leading upwardly and lat-- erally out of direct communication with the interior of the cylinder and adapted to have its lower end connected to an air pump, and an air coolingcoil surrounding said'cylinder with one end in communication with said air inlet passage and its othercend discharging into said'cylinder; i

A device of the class described colnpris-j ing a hollow oil'vapor condensing cylinder closed at both ends and provided 1n its upper end wallwith an air outlet adapted for con-,

nection to a tire inflating hoseythe lower end wall of said cylinder having an air inlet passage leading upwardly and laterally out of direct communication with'the interior of the cylinder and adapted to have its lower end connected to an'air punipyan air'cooling coil surrounding said "cylinder with its lower end in communication with said air inlet passage, the upper end of said coil discharging into the cylinder near its upper end, and a sleeve depending fromthe upper end wall of said'cylinder around said air outlet I In testimony whereof I have hereunto set my hand.

DANIEL ROHRER. 

